Search: id:A079339
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%I A079339
%S A079339 1,5,37,25,2,185,143,125,12345679,1,1,925,77,715,74,625,653,61728395,
%T A079339 579,5,481,5,4787,4625,4,385,40781893,3575,37969,37,3581,3125,3367,3265,
%U A079339 286,308641975,3,2895,259,25,271,2405,25607,25,24691358,23935,213,23125
%N A079339 Least k such that k*n contains only 1's and 0's in decimal representation 
               of k*n, or 0 if no k exists.
%F A079339 a(n) = A004290(n)/n.
%e A079339 3*37=111 and no integer k<37 has this property, hence a(3)=37
%o A079339 (PARI) ?d(n,i)=floor(n/10^(i-1))-10*floor(n/10^i); ?test(n)=sum(i=1,ceil(log(n)/
               log(10)),if(d(n,i)*(1-d(n,i)),1,0)); ?a(n)=if(n<0,0,s=1; while(test(n*s)>
               0,s++); s)
%Y A079339 Cf. A004290, A070189, A078241-A078248, A079339, A096681-A096688.
%Y A079339 Sequence in context: A002666 A119483 A157809 this_sequence A043075 A106129 
               A096673
%Y A079339 Adjacent sequences: A079336 A079337 A079338 this_sequence A079340 A079341 
               A079342
%K A079339 base,nonn
%O A079339 1,2
%A A079339 Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 13 2003
%E A079339 More terms from Vladeta Jovovic (vladeta(AT)eunet.rs) and Matthew Vandermast 
               (ghodges14(AT)comcast.net), Feb 14 2003

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